Swift 2.0 Get Mirrored Superclass Properties

Question

I need to get the properties of my class as a dictionary. For simplicity, I created a protocol which has a default implementation as follows:

protocol ListsP         


        

Answer 1

Here is my Implementation

• supports chain of inheritance
• supports nested objects
• unwraps optionals if .some
• supports enums with rawValue
• supports arrays

.

public protocol Serializable {
    func serialize() -> [String: Any]
}

extension Serializable {
    public func serialize() -> [String: Any] {
        var result = [String: Any]()
        var enumeratingMirror: Mirror? = Mirror(reflecting: self)

        while true {
            guard let mirror = enumeratingMirror else { break }

            for child in mirror.children {
                guard let label = child.label else { continue }

                switch child.value {
                case let serializable as Serializable:
                    if case .some(let value) = optional {
                        result[label] = value
                    }

                case let rawRepresentable as RawRepresentable:
                    result[label] = rawRepresentable.getValueAsAny()

                case let optional as Optional:
                    if case .some(let value) = optional {
                        result[label] = value
                    }

                default:
                    result[label] = child.value
                }
            }

            enumeratingMirror = mirror.superclassMirror
        }

        return result
    }
}

extension Collection where Iterator.Element: Serializable {
    public func serialize() -> [[String: Any]] {
        return map { $0.serialize() }
    }
}

extension RawRepresentable {
    public func getValueAsAny() -> Any {
        return rawValue
    }
}

Usage

class BaseUser: Serializable { let id: Int = 1 }
class User: BaseUser { let name: String = "Aryan" }

let user = User()
print(user.serialize())   // {"id": 1, "name": "Aryan"}
print([user].serialize()) // [{"id": 1, "name": "Aryan"}]